Relief-valve for pipes.



@eva-mma i l I* A w E D zw 16.815,236. 1 I lPMFNTBD MAR.13,1906.

RTRUMP..

RELIEF VALVE PoR PIPES.l APPLICATION FILED AUG. 29. 1904'.

2 SHEETS-SHEET Z.

*m MM s zen of the United States, residing at Spring- "UNITED- sTATRs PATENT OFFIOIII...V

l FULLER TRUMI), OFSPRINGFIELD, OHIO, vAssIcrNoR To THE TRUMP lMANUFACTURING COMPANY, OF SPRINGFIELD, OHIO, A CORPO- RATION or OHIO.- .Y

RLlEFe-VALVE FOR PIPES.v

Specification. of Letters Patent.

Patented March 13, 1906.

f Application filed August 259, 1904. Serial No. 222,536.'

T all whom itWz/ay'concerrc;

Be it known that l, FULLER TRUMP, a citifield, inthe county of Clark and State of Ohio', have invented certain new and. useful Improvements in Relief -Valves' for Pipes, of which the following is a specification.

My invention relates to improvements in reliefvalves for'high pressure pipes where there is a fluctuation of the liquid or iiuidin said pipesQ v The object of my invention is to provide an improved relief -valve designed to be forced open under a certain strain to prevent the `bursting of themain to which it is attached, and also to provide means for cushv is maintained at a high pressure. Connected ionin the said valve, and also for automatically c osing the valve by the pressure `of the liquid or iiuid within the main.

My inventionconsists in the constructions and combinationof parts hereinafter described, and set forth in the claims.

In the accompanying drawings, Figure 1 is i a side elevation of myimproved device shown attached to a main. Fig. 2 is a vertical sectional view of the same. Fi 8 is a detail of the air-operatedvalve and evices for operating same.

Like parts are represented by similar letters of reference in the several views. p In the said drawings, a represents a water, gas, or other main 4in, which the liquid or fluid to said main at any suitable point is a valveseat a', having seated thereon a valve vb. This valve t is preferably in the natureof a pup et-valve, with guidin -Wings b2 b2 eX- ten `ng into the seat a, an said valve is -secured to said seat by a series of bolts b3, which bolts are tested in advance to break under a certain predetermined strain, the diameters' of the respective bolts near their centers being reduced for this purpose, as shown. Above said valve b there is supported on an extension fromthe valve seat' through the medium of supportingstandards cl a chamber c. Within this chamber there isv a piston c2, connected by a rod or stem c3 with the valve b. Extending from a suitable oint in the main a to the upper part of the c amber c is a pipe connection c5 of Y comparatively small' dimensions, and within thisV pi e connection there is placed a valve c, preferably a' gate-valve of the ordinary type. Secured to said valve is a small cylinder c7, having therein a iston c8 adapted, through the medium of t e rod c9 and lever C10, to operate said gate valve. Leading from the upper part of the chamber c to the cylinder c7. is a small pipe 011. In the lower part of the chamber c just above the iston c2 when'in its normal position isa sma l outlet cl2.

The operation of the device is as follows: If the pressure within the Inain a increases for any reason to a`degree sufficient to endanger the main, the bolts b3 will break, the pressure in the main thereupon forcing the valve from its seat and likewise forcing the piston c2 into the-chamber c. As the piston moves into the chamber the air therein will be compressed, thus forming an air-cushion for the valve b, giving an easy gradual movement to the same.

pipe 011 to the cylinder c7 and acting upon the piston in said cylinder will open the valve c, thus allowing the liquid or fluid from the main .a toenter the upper part of the chamber c.

pens that quite a length of pipe is required v between the chamber c and the valve c6.

Itshould be stated that in practice the diameter ofthe piston c2 should be somewhat greater than that of the valve b in order to' aord an increased area to permit the pres- As the air is compressed in the chamber cit will be forced through the small sure on the piston to overcome the pressure on the valve.

' After the valve b 'has'been bolted to its seat the valve c will be closed-by hand to cut off the supply in the pipe c5, and the water or other liquid in the chamber c will be permitted to escape through the outlet cs. A drain-trough c4 is also provided to catch any liquid which may leak through the piston to prevent it falling on the workmen while securing the valve b in place.

Having thus described my invention, I claim 1. The combination of a main, a reliefvalve therein, a chamber in proximity to said relief-valve, a piston in said chamber connected to said relief-valve, a pipe connection from said main to said chamber, a valve in said pipe connection, and means controlled by said piston for operating said pipe-valve when said relief-valve is opened, substantially as specified.

2. The combination of a main, a reliefvalve therein, a chamber in proximity to said relief-valve, a piston in said chamber connected to said relief-valve, a pipe leading from said main to said chamber, an air-operated valve in said pipe, and an air-pipe leading from said chamber to said pipe-valve, substantially as specified.

3. The combination of a main, a reliefvalve therein, an air-chamber in proximity to said relief-valve, means connected with said valve for compressing the air Within said chamber, and means for establishing a connection between said chamber and main controlled by the air compressed within said chamber, for the purpose specified.

4. A main, a relief-valve therein, an airchamber in proximity thereto, a piston in said air-chamber connected to said valve, a normally closed connection from said main to said chamber, said piston being adapted when said relief-valve is opened to compress the air in said chamber to form an air-cushion and to open the connection between said main and chamber, substantially as and for the purpose specified.

5. A main, a relief-valve therein, operating devices connected to said valve, a normally closed connection from said main to said operating devices, and means operated by the opening of said relief-valve to open said connection to cause said operating devices to close said valve by the pressure in said main, substantially asspeciiied.

6. A main, a relief-valve therein, a chamber in proximity to said relief-valve, a piston in said chamber connected to said reliefvalve, a pipe connection from said main to said chamber, an vair-operated valve in said pipe connection, a pipe connection from said chamber to said air-operated valve, and check-valve in said first-mentioned pipe con nection in proximity to said chamber, substantially as specified.

7. The combination of a main with a rclief-valve therein, a piston connected with said valve, a chamber for said piston connections between said chamber and said main, means for holding said valve securely to the seat, but adapted to permit same to be opened under a certain predetermined pressure means for opening automatically the connections extending from said chamber to said main for returning said valve to its seat, and means for preventing a discharge of the water flowing from said main through said chamber until said valve is returned to normal position, substantially as specified.

8. A main, a relief-valve therein, an aircushion for said valve, and means operated by said aircushion, when said valve is opened, for permitting the pressure in said main t0 return said valve to its seat, substantially as specified.

9. A main, a relief-valve therein, a piston connected with said relief-valve, and a chamber for said. piston connections between said piston-chamber and said main, adapted to be automatically opened by said piston, means for preventing a discharge of the water from said chamber until said valve is returned to normal position, substantially as specified.

l0. A main, a relief-valve therein adapted to open under a certain pressure in said main, a normally closed connection leading from said main to the outside of the actuat,L ing device, and means, when said valve is opened, for opening said connection to peri mit the pressure in said main to return said valve to its seat, substantially as specified.

In testimony whereof I have hereunto set my hand this 25th day of August, A. D. 1904.

FULLER TRUMP.

` Witnesses:

CHAs. I. WELCH, CLIFTON P. GRANT. 

